/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf -i ../../../trunk/examples/svcomp/loops/string-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-11 01:58:15,806 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-11 01:58:15,807 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-11 01:58:15,837 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-11 01:58:15,837 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-11 01:58:15,838 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-11 01:58:15,839 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-11 01:58:15,840 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-11 01:58:15,841 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-11 01:58:15,842 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-11 01:58:15,843 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-11 01:58:15,843 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-11 01:58:15,844 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-11 01:58:15,844 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-11 01:58:15,845 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-11 01:58:15,846 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-11 01:58:15,846 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-11 01:58:15,847 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-11 01:58:15,848 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-11 01:58:15,849 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-11 01:58:15,850 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-11 01:58:15,853 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-11 01:58:15,853 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-11 01:58:15,860 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-11 01:58:15,867 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-11 01:58:15,869 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-11 01:58:15,869 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-11 01:58:15,870 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-11 01:58:15,870 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-11 01:58:15,871 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-11 01:58:15,871 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-11 01:58:15,871 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-11 01:58:15,872 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-11 01:58:15,872 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-11 01:58:15,872 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-11 01:58:15,873 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-11 01:58:15,873 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf [2022-01-11 01:58:15,886 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-11 01:58:15,887 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-11 01:58:15,887 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-11 01:58:15,887 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-11 01:58:15,888 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-11 01:58:15,888 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-11 01:58:15,888 INFO L138 SettingsManager]: * Use SBE=true [2022-01-11 01:58:15,888 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-11 01:58:15,888 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-11 01:58:15,889 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-11 01:58:15,889 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-11 01:58:15,889 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-11 01:58:15,889 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-11 01:58:15,889 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-11 01:58:15,889 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-11 01:58:15,889 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-11 01:58:15,889 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-11 01:58:15,889 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-11 01:58:15,889 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-11 01:58:15,890 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-11 01:58:15,890 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-11 01:58:15,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 01:58:15,890 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-11 01:58:15,890 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-11 01:58:15,890 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-11 01:58:15,890 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-11 01:58:15,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-11 01:58:15,891 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-11 01:58:15,891 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-11 01:58:15,891 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-11 01:58:15,891 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-11 01:58:15,891 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-11 01:58:15,892 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-11 01:58:15,893 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_SUM WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-11 01:58:16,108 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-11 01:58:16,120 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-11 01:58:16,122 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-11 01:58:16,122 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-11 01:58:16,123 INFO L275 PluginConnector]: CDTParser initialized [2022-01-11 01:58:16,124 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/string-1.i [2022-01-11 01:58:16,165 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc4654834/b87f2aab948d4234b81fd930238bafd1/FLAG7cf2cad2a [2022-01-11 01:58:16,538 INFO L306 CDTParser]: Found 1 translation units. [2022-01-11 01:58:16,538 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/string-1.i [2022-01-11 01:58:16,543 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc4654834/b87f2aab948d4234b81fd930238bafd1/FLAG7cf2cad2a [2022-01-11 01:58:16,555 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc4654834/b87f2aab948d4234b81fd930238bafd1 [2022-01-11 01:58:16,557 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-11 01:58:16,559 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-11 01:58:16,562 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-11 01:58:16,562 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-11 01:58:16,564 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-11 01:58:16,564 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 01:58:16" (1/1) ... [2022-01-11 01:58:16,565 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3beb2c95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:58:16, skipping insertion in model container [2022-01-11 01:58:16,565 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 01:58:16" (1/1) ... [2022-01-11 01:58:16,572 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-11 01:58:16,584 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 01:58:16,719 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/string-1.i[896,909] [2022-01-11 01:58:16,731 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 01:58:16,737 INFO L203 MainTranslator]: Completed pre-run [2022-01-11 01:58:16,745 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/string-1.i[896,909] [2022-01-11 01:58:16,751 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 01:58:16,760 INFO L208 MainTranslator]: Completed translation [2022-01-11 01:58:16,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:58:16 WrapperNode [2022-01-11 01:58:16,760 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-11 01:58:16,761 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-11 01:58:16,761 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-11 01:58:16,761 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-11 01:58:16,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:58:16" (1/1) ... [2022-01-11 01:58:16,770 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:58:16" (1/1) ... [2022-01-11 01:58:16,783 INFO L137 Inliner]: procedures = 17, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 124 [2022-01-11 01:58:16,783 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-11 01:58:16,784 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-11 01:58:16,784 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-11 01:58:16,784 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-11 01:58:16,788 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:58:16" (1/1) ... [2022-01-11 01:58:16,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:58:16" (1/1) ... [2022-01-11 01:58:16,790 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:58:16" (1/1) ... [2022-01-11 01:58:16,791 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:58:16" (1/1) ... [2022-01-11 01:58:16,795 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:58:16" (1/1) ... [2022-01-11 01:58:16,798 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:58:16" (1/1) ... [2022-01-11 01:58:16,799 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:58:16" (1/1) ... [2022-01-11 01:58:16,800 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-11 01:58:16,801 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-11 01:58:16,801 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-11 01:58:16,801 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-11 01:58:16,802 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:58:16" (1/1) ... [2022-01-11 01:58:16,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 01:58:16,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 01:58:16,873 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-11 01:58:16,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-11 01:58:16,944 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-11 01:58:16,944 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-01-11 01:58:16,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-11 01:58:16,944 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-11 01:58:16,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-11 01:58:16,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-11 01:58:16,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-01-11 01:58:16,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-11 01:58:17,013 INFO L234 CfgBuilder]: Building ICFG [2022-01-11 01:58:17,015 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-11 01:58:17,187 INFO L275 CfgBuilder]: Performing block encoding [2022-01-11 01:58:17,191 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-11 01:58:17,191 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-01-11 01:58:17,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 01:58:17 BoogieIcfgContainer [2022-01-11 01:58:17,206 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-11 01:58:17,207 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-11 01:58:17,207 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-11 01:58:17,208 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-11 01:58:17,210 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 01:58:17" (1/1) ... [2022-01-11 01:58:17,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 01:58:17 BasicIcfg [2022-01-11 01:58:17,350 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-11 01:58:17,351 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-11 01:58:17,351 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-11 01:58:17,353 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-11 01:58:17,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 01:58:16" (1/4) ... [2022-01-11 01:58:17,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57f745d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 01:58:17, skipping insertion in model container [2022-01-11 01:58:17,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:58:16" (2/4) ... [2022-01-11 01:58:17,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57f745d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 01:58:17, skipping insertion in model container [2022-01-11 01:58:17,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 01:58:17" (3/4) ... [2022-01-11 01:58:17,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57f745d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 01:58:17, skipping insertion in model container [2022-01-11 01:58:17,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 01:58:17" (4/4) ... [2022-01-11 01:58:17,355 INFO L111 eAbstractionObserver]: Analyzing ICFG string-1.iTransformedIcfg [2022-01-11 01:58:17,358 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-11 01:58:17,358 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-11 01:58:17,385 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-11 01:58:17,392 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-11 01:58:17,392 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-11 01:58:17,401 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 01:58:17,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-11 01:58:17,404 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 01:58:17,404 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 01:58:17,405 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 01:58:17,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 01:58:17,408 INFO L85 PathProgramCache]: Analyzing trace with hash -600266572, now seen corresponding path program 1 times [2022-01-11 01:58:17,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 01:58:17,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359629149] [2022-01-11 01:58:17,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 01:58:17,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 01:58:17,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 01:58:17,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 01:58:17,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 01:58:17,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359629149] [2022-01-11 01:58:17,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359629149] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 01:58:17,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 01:58:17,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-11 01:58:17,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868990518] [2022-01-11 01:58:17,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 01:58:17,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-11 01:58:17,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 01:58:17,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-11 01:58:17,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-11 01:58:17,569 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 01:58:17,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 01:58:17,582 INFO L93 Difference]: Finished difference Result 48 states and 74 transitions. [2022-01-11 01:58:17,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-11 01:58:17,584 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-11 01:58:17,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 01:58:17,588 INFO L225 Difference]: With dead ends: 48 [2022-01-11 01:58:17,588 INFO L226 Difference]: Without dead ends: 22 [2022-01-11 01:58:17,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-11 01:58:17,594 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 01:58:17,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 01:58:17,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-11 01:58:17,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-01-11 01:58:17,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 01:58:17,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2022-01-11 01:58:17,619 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 16 [2022-01-11 01:58:17,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 01:58:17,620 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2022-01-11 01:58:17,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 01:58:17,621 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-01-11 01:58:17,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-11 01:58:17,622 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 01:58:17,622 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 01:58:17,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-11 01:58:17,623 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 01:58:17,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 01:58:17,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1680051667, now seen corresponding path program 1 times [2022-01-11 01:58:17,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 01:58:17,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299622435] [2022-01-11 01:58:17,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 01:58:17,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 01:58:17,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 01:58:17,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 01:58:17,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 01:58:17,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299622435] [2022-01-11 01:58:17,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299622435] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 01:58:17,795 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 01:58:17,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 01:58:17,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103654077] [2022-01-11 01:58:17,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 01:58:17,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 01:58:17,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 01:58:17,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 01:58:17,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 01:58:17,797 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 01:58:17,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 01:58:17,864 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2022-01-11 01:58:17,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 01:58:17,864 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-11 01:58:17,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 01:58:17,866 INFO L225 Difference]: With dead ends: 50 [2022-01-11 01:58:17,866 INFO L226 Difference]: Without dead ends: 32 [2022-01-11 01:58:17,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 01:58:17,867 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 7 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 01:58:17,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 33 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 01:58:17,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-11 01:58:17,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2022-01-11 01:58:17,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 01:58:17,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2022-01-11 01:58:17,872 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 18 [2022-01-11 01:58:17,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 01:58:17,872 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2022-01-11 01:58:17,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 01:58:17,873 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2022-01-11 01:58:17,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-11 01:58:17,873 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 01:58:17,873 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 01:58:17,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-11 01:58:17,873 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 01:58:17,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 01:58:17,874 INFO L85 PathProgramCache]: Analyzing trace with hash -195794894, now seen corresponding path program 1 times [2022-01-11 01:58:17,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 01:58:17,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140981012] [2022-01-11 01:58:17,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 01:58:17,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 01:58:17,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 01:58:17,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 01:58:17,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 01:58:17,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140981012] [2022-01-11 01:58:17,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140981012] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 01:58:17,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016776549] [2022-01-11 01:58:17,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 01:58:17,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 01:58:17,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 01:58:17,980 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 01:58:17,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-11 01:58:18,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 01:58:18,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-11 01:58:18,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 01:58:18,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-11 01:58:18,164 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-11 01:58:18,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016776549] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 01:58:18,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-11 01:58:18,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-01-11 01:58:18,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507985705] [2022-01-11 01:58:18,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 01:58:18,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 01:58:18,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 01:58:18,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 01:58:18,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-11 01:58:18,166 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 01:58:18,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 01:58:18,168 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2022-01-11 01:58:18,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 01:58:18,168 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-11 01:58:18,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 01:58:18,168 INFO L225 Difference]: With dead ends: 24 [2022-01-11 01:58:18,168 INFO L226 Difference]: Without dead ends: 0 [2022-01-11 01:58:18,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-11 01:58:18,169 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 01:58:18,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 01:58:18,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-01-11 01:58:18,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-01-11 01:58:18,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 01:58:18,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-01-11 01:58:18,171 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2022-01-11 01:58:18,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 01:58:18,171 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-01-11 01:58:18,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 01:58:18,171 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-01-11 01:58:18,171 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-01-11 01:58:18,173 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-11 01:58:18,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-11 01:58:18,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 01:58:18,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-01-11 01:58:18,399 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-01-11 01:58:18,399 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-01-11 01:58:18,399 INFO L861 garLoopResultBuilder]: At program point L33-3(lines 33 34) the Hoare annotation is: true [2022-01-11 01:58:18,400 INFO L858 garLoopResultBuilder]: For program point L33-4(lines 33 34) no Hoare annotation was computed. [2022-01-11 01:58:18,400 INFO L858 garLoopResultBuilder]: For program point L33-2(lines 33 34) no Hoare annotation was computed. [2022-01-11 01:58:18,400 INFO L858 garLoopResultBuilder]: For program point L35(line 35) no Hoare annotation was computed. [2022-01-11 01:58:18,400 INFO L861 garLoopResultBuilder]: At program point L71(lines 28 72) the Hoare annotation is: true [2022-01-11 01:58:18,400 INFO L861 garLoopResultBuilder]: At program point L37-3(lines 37 38) the Hoare annotation is: true [2022-01-11 01:58:18,400 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-01-11 01:58:18,400 INFO L858 garLoopResultBuilder]: For program point L37-4(lines 37 38) no Hoare annotation was computed. [2022-01-11 01:58:18,400 INFO L858 garLoopResultBuilder]: For program point L37-2(lines 37 38) no Hoare annotation was computed. [2022-01-11 01:58:18,400 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-01-11 01:58:18,400 INFO L858 garLoopResultBuilder]: For program point L39(line 39) no Hoare annotation was computed. [2022-01-11 01:58:18,401 INFO L861 garLoopResultBuilder]: At program point L42-3(lines 42 43) the Hoare annotation is: true [2022-01-11 01:58:18,401 INFO L858 garLoopResultBuilder]: For program point L42-4(lines 42 43) no Hoare annotation was computed. [2022-01-11 01:58:18,401 INFO L858 garLoopResultBuilder]: For program point L42-1(lines 42 43) no Hoare annotation was computed. [2022-01-11 01:58:18,401 INFO L861 garLoopResultBuilder]: At program point L46-3(lines 46 47) the Hoare annotation is: true [2022-01-11 01:58:18,401 INFO L858 garLoopResultBuilder]: For program point L46-4(lines 29 72) no Hoare annotation was computed. [2022-01-11 01:58:18,402 INFO L858 garLoopResultBuilder]: For program point L46-1(lines 46 47) no Hoare annotation was computed. [2022-01-11 01:58:18,402 INFO L861 garLoopResultBuilder]: At program point L55-2(lines 53 65) the Hoare annotation is: true [2022-01-11 01:58:18,402 INFO L858 garLoopResultBuilder]: For program point L53-2(lines 53 65) no Hoare annotation was computed. [2022-01-11 01:58:18,404 INFO L858 garLoopResultBuilder]: For program point L55(lines 55 64) no Hoare annotation was computed. [2022-01-11 01:58:18,404 INFO L858 garLoopResultBuilder]: For program point L19(lines 19 21) no Hoare annotation was computed. [2022-01-11 01:58:18,406 INFO L858 garLoopResultBuilder]: For program point L20(line 20) no Hoare annotation was computed. [2022-01-11 01:58:18,406 INFO L861 garLoopResultBuilder]: At program point L19-2(lines 18 23) the Hoare annotation is: true [2022-01-11 01:58:18,407 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 20) no Hoare annotation was computed. [2022-01-11 01:58:18,409 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-01-11 01:58:18,409 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-11 01:58:18,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 01:58:18 BasicIcfg [2022-01-11 01:58:18,415 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-11 01:58:18,418 INFO L158 Benchmark]: Toolchain (without parser) took 1856.99ms. Allocated memory was 239.1MB in the beginning and 316.7MB in the end (delta: 77.6MB). Free memory was 188.5MB in the beginning and 261.4MB in the end (delta: -72.9MB). Peak memory consumption was 5.2MB. Max. memory is 8.0GB. [2022-01-11 01:58:18,418 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 239.1MB. Free memory is still 204.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-11 01:58:18,418 INFO L158 Benchmark]: CACSL2BoogieTranslator took 198.67ms. Allocated memory is still 239.1MB. Free memory was 188.3MB in the beginning and 214.0MB in the end (delta: -25.7MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-01-11 01:58:18,418 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.24ms. Allocated memory is still 239.1MB. Free memory was 214.0MB in the beginning and 212.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-11 01:58:18,418 INFO L158 Benchmark]: Boogie Preprocessor took 16.79ms. Allocated memory is still 239.1MB. Free memory was 212.4MB in the beginning and 210.8MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-11 01:58:18,419 INFO L158 Benchmark]: RCFGBuilder took 405.44ms. Allocated memory is still 239.1MB. Free memory was 210.8MB in the beginning and 198.7MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-01-11 01:58:18,419 INFO L158 Benchmark]: IcfgTransformer took 143.26ms. Allocated memory is still 239.1MB. Free memory was 198.3MB in the beginning and 187.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-01-11 01:58:18,419 INFO L158 Benchmark]: TraceAbstraction took 1064.56ms. Allocated memory was 239.1MB in the beginning and 316.7MB in the end (delta: 77.6MB). Free memory was 187.2MB in the beginning and 261.4MB in the end (delta: -74.2MB). Peak memory consumption was 4.0MB. Max. memory is 8.0GB. [2022-01-11 01:58:18,421 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 239.1MB. Free memory is still 204.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 198.67ms. Allocated memory is still 239.1MB. Free memory was 188.3MB in the beginning and 214.0MB in the end (delta: -25.7MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 22.24ms. Allocated memory is still 239.1MB. Free memory was 214.0MB in the beginning and 212.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 16.79ms. Allocated memory is still 239.1MB. Free memory was 212.4MB in the beginning and 210.8MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 405.44ms. Allocated memory is still 239.1MB. Free memory was 210.8MB in the beginning and 198.7MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * IcfgTransformer took 143.26ms. Allocated memory is still 239.1MB. Free memory was 198.3MB in the beginning and 187.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 1064.56ms. Allocated memory was 239.1MB in the beginning and 316.7MB in the end (delta: 77.6MB). Free memory was 187.2MB in the beginning and 261.4MB in the end (delta: -74.2MB). Peak memory consumption was 4.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 20]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.0s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 7 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7 mSDsluCounter, 116 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 38 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 18 IncrementalHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 78 mSDtfsCounter, 18 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=0, InterpolantAutomatonStates: 8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 8 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 15 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 78 NumberOfCodeBlocks, 78 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 74 ConstructedInterpolants, 0 QuantifiedInterpolants, 107 SizeOfPredicates, 4 NumberOfNonLiveVariables, 238 ConjunctsInSsa, 5 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 3/4 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 53]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2022-01-11 01:58:18,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...